Damper apparatus



Sept. 6, 1932. A. s. FLETCHER DAMPER APPARATUS Original Filed Feb. 6. 1930 ATTORNEY Patented Sept. 6, 1932 UNITED TATES PATENT OFFICE;

AZRCHIIBALDVG. rnn'rcnna, or SPRINGFIELD,MASSACHUSETTS' DAMPER APPARATUS Applicationfiled ream-y. 6, 1e3o,]seriai No. 42G,3 57 '.i .Benewed men 7, .1932."

This inventionrelates to improvements in damper apparatus and 1s dlrected more particularly to apparatus for operating flue 1 ferred and which for purposes of disclosure is shown in thej'accompanying drawing, in which:

" Fig. ,1- a front elevationallview of the "lever operating'means'forming a part ofthe invention;

'Fig. 2 is a partial sectional elevational view through a flue and showing certain details of construction. q

Fig. 3 is a rear elevational view of a housing forming part of the invention. I

Fig. 4 is a small scale plan view of a plate for retaining the operating leverin place, and V .Fig. 5 is a smallscale perspective view of the hub portion of the operating lever showin'gcertain details of construction. L V eferring to the drawing, the invention will now be described ind'etaily r I flue or air duct is represented at 2, which in ordinary practise is run along awall or between wall forming sections so as to. be concealed. In. the form offlthe invention shown the flue ,is disposed at one side' ofa wall or partition- W and may be an airduct "through which it is desiredto cont rol" the flowof air by a damper 4 which is shown as being in an open position. When closed it will assume a substantially. horizontal position.

The damper may take any well known form and has onits opposite sides trunnion blocks 6 and 8 which have trunnions' 10 as @345 shown on the block 6'extending'therefrom."

I "A housing 12 as shown in Figs. 2andl3is secured :to the flue by any suitable means. The housing comprisesfa hollow body 16 7 anda cover-plate '18 secured thereto. Lugs 20 extending from the body are secured to :thefflue in the embodiment of theinvention shown.

A socketmember 24 is provided withian,

outer raceway and'is mountedfor} rotation by means of balls 26 inthe housing as shown.

The cover plate 18 of the housing has anIoutwardly projecting hub or boss .19 ,whichQis interiorly threaded for receiving 'athreaded end of a'tube 28 which may' be offany desired length for extending through the wall Was shown. I i

shaft 30 preferably, in the form of, a square tube extends through the tube 2 8. f Its inner end is receivable in the socket 24-and it in turnreceives a squared trunni0n'10 of i the block 6. A trunnionf (not shown "of block 8 is rotatableinfa bearing assembly 32 carried by the flue-2. f Since the bushing 24 is'rotatable, in the member 16 thejdamper may swing between open andclosed'positions. Referring to Fig." 3 means will bedescribed for-urging the bushing 24 in one direction or in adirection for rotating the dampergto a closed position. The housing'l6 is provided with a lug"34 projecting' inwardly fromf an 75 opening" 36 Land a lug 38 extends radially from v the; bushing. 24. Between 1 the lugs a compression..spring,is disposed and against which thelug 3,8 acts as .thebushing 24 is l rotated counterclockwise. The damper with 30 referenceto Fig. 3 s win'gs counter-clockwise to open and therefore opens against the: ac-

tion of the spring which of course tends to urge the damper in a clockwisejdirection. I

A wall plate 44 is provided for securingto the face of a wall bymeans of screws 46 and has an internally threade'dboss or hub 45 so that it may be'screwed onto an outer threaded end of tube 28. When screwed onto I i the tube the screws 46 arefs'crewed intofthe no Lil wall and the wall plate is held thereby against rotation.- c

A retaining plate 48 is removably secured to thewall plate by screws 50 in suitable 5 tapped holes in the wall plate and this has a central opening 50 with an inwardly extendiilg lip 52; An operating lever 54 has a cylindrical hub or shaft 56 provided with a cut-away portion 58 longitudinally thereof and a peripheral groove 60, While a squared portion 62 extends from the end thereof and is receivable inthe outer end of the square shaft30.' i

The lever 54: and'plate' 48 are assembled by slipping the hub of the lever throughthe Opening of herlate :This may hastens rotating one or the other so that the lip 52 of the plate passes through the cutawayipori tion- 58 of the until the lip 52 registers with the groove 60 ofthe hub-when th plate and handle Inay herotated relative to one 1.} ,thr-, r' v r ftion of the d mper and swings in a clockwise pnWhieh the damperclose s. WVitl the retaining'plate and lever assembled the hub ofthe lever is inserted in'the tube28'with its stiuared end slipped'into th'ie Square tubulQ i 'haft'S I W b -l1n erst d thfl fih 'leverbfland damper'a're dispds'e'd in correct i r e tib if p per. kin 'rat on- T j ip at'e isth ta ed a d secured in a by msans'bf the S rew ,0 11 h tbs tle ithe l er iShl'p ag ins e wisie mtive'mentby means oftlie cepemtin 'h an srse et s utaway po i n the le ra ana ofg cg s w t .th lip 9 the Pl te l Isa-g rls it not h sw ni he Per phery- "A ri 7 i pbs f'din' a rename -s h han leiis ar anged totr e the l Qf the hand gapin kickin i i'g ritwith the a "leve Qu11er21q wis m r's Qf h er fwil iI VQ' the d p r, i om sed p si ion faiins th jacfi ni ft Spr n Q Whi1 reverse movementthereof, isaccompl ished by a t gn ft Sp ing 0" wh h, l more h ampsnw fi s l sed P tion By means of'the pawl and notches the lever is in'g movement ofthe hand grip against the action of thespring will permit the lever be readi y rotae th di e t ni V The trunnionlljO of the block 6 instead of entering the tubular shaft may fit within the v sleeve ifde'sire'd, By means oi the constructi m. he lampermayz e. m 0 ta io .id m mb h -r tata le e ta n a ilheus v 21 s and a unmenon sndf ampen-i The levenas shown'in'F g. 1, is 111 pos rre ji p lng to a l' te med a e n0 .1-

. ,v I V 1 "within Saidirotatablesoclget, A: and gr p 62, is p voted a ,6/1: in he a A Q Wall an a dam-Perl in said 1 1 B -Witho it ii h fp rt assembl d She win the.

51 rot ted by t ih nd ri1 -;6 A

member havinga hub provided with a circumferential recess and "a longitudinal groove, a retaining plate having an opening whi h hu :is retatabl and an Wardly extending lip in said recess to hold :said voperating member and retaining plate against separation except when said groove and-lip arei'n-alignment, connections between eratinge means therefor comprising in a combinatibn, ahou ng on said fi'ue havinga socket rhtatable-therein, a wall plate on said Wall, etai in us 'on S id Wall plat p ev li d it an e ing" ha i g an War y exte l a nawin m mbe re tablin id' s e in havlieg circumiisrsnt cs- S h sh rs eiv s said Filip wher by e .rpember 1 an plate are eld against separation and provided with lons ud eali eerete p rmit s pa at lois Pl ts a m herfwhen th lip ali ns wit said groove, and a member connecting said separa in memb t anar a s d damp "3.Th combination of flue at one side wall, a retaining plate on said Wall plate p e id fil wit all ene es. ha i warfllr x end lip; opera in memb rbtatablill' Q smellsne a circumterential rec ss whieh, rece veslip whereby the member 1 and plate are 1hl a ainst sepa ationfan l nror dedflwitli 1011- r t'udi a fg e le to perm ti narat en 0 s id 'iila efiand me ber iihe the prali n th sa i veam mb Co cting sai J e e v I s t1ne,m m erto.a artor said damper "locked n any'des red'positlon, wh lea rais- P sed aw arried yai epem ie m mber for engaging eeth carriefd1bysaidii 1 Plate t he 'd tl member in a pu n s- :ti x r 9i ad u tm n relativ o s drplate at. The combination of flue atoneside at Wal d. a dam 17 in sa "fi enerating m ans: th ef r, "Compr ng; in

a 0 hous ng e ii fi enan jeskstlm s be i r t tab eft tr iit awa l 1,

plate on said wall provided with peripheral teeth, a retaining plate on said wall plate having a central opening provided with an inwardly extending lip, an operating member having a hub in said opening which is provided with a circumferential recess receiving said lip and a longitudinal groove to register with said lip to permit separation of sa1d plate and member, a spring pressed pawl on said member for engaging said. teeth, and a shaft connected at one end to said operating member and at its other end to said socket member and to a part provided 011 said damper.

In testimony whereof I afiix my signature.

ARGHIBALD G. FLETCHER. 

